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Title: Synthesis of pyrazole and isoxazole in triethanolamine medium.
Authors: Agrawal, Nitin N
Soni, P A
Keywords: Chalcone
Issue Date: Mar-2007
Publisher: CSIR
Series/Report no.: Int.Cl.⁸C07D
Abstract: Reactions of 2′-hydroxy chalcone dibromides 2a-l with phenyl hydrazine and hydrazine hydrate afford pyrazoles 1a-l and with hydroxylamine hydrochloride give isoxazoles 5a-f in triethanolamine medium. Similarly reaction of β-diketone 3b-e with phenyl hydrazine and hydrazine hydrate in TEA gives pyrazoles 4a-l in high yield in shorter time. The products are confirmed by their m.p., m.m.p., chemical analysis and IR, ¹H NMR spectral data.
Description: 532-534
ISSN: 0376-4699
Appears in Collections:IJC-B Vol.46B(03) [March 2007]

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